Envío 3619

Código

def add_two_big_numbers(big_number_one, big_number_two):
    larger, small = None, None
    if len(big_number_one) > len(big_number_two):
        larger = big_number_one
        small = big_number_two
    else:
        larger = big_number_two
        small = big_number_one

    carry = 0
    small_number_index = len(small) - 1
    larger_number_index = len(larger) - 1
    while True:
        if small_number_index < 0 and carry == 0:
            break

        if larger_number_index < 0 and carry > 0:
            larger.insert(0, carry)
            break

        small_number_digit = small[small_number_index] if small_number_index >= 0 else 0
        addition = small_number_digit + larger[larger_number_index] + carry
        larger[larger_number_index] = addition % 10
        carry = addition // 10
        small_number_index -= 1
        larger_number_index -= 1

    print(''.join(map(str, larger)))


big_number_one = [int(char) for char in input()]
big_number_two = [int(char) for char in input()]
add_two_big_numbers(big_number_one, big_number_two)